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            <h4>TOC</h4>
            <ol class="post-toc"><li class="post-toc-item post-toc-level-2"><a class="post-toc-link" href="#学习笔记-DBUtils工具"><span class="post-toc-number">1.</span> <span class="post-toc-text">学习笔记 : DBUtils工具</span></a><ol class="post-toc-child"><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#API-介绍"><span class="post-toc-number">1.1.</span> <span class="post-toc-text">API 介绍</span></a></li><li class="post-toc-item post-toc-level-3"><a class="post-toc-link" href="#CURE-案例"><span class="post-toc-number">1.2.</span> <span class="post-toc-text">CURE 案例</span></a></li></ol></li></ol>
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        <h1 class="post-card-title">DBUtils</h1>
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            <time class="post-time" title="2019-05-30 17:28:41" datetime="2019-05-30T17:28:41.000Z"  itemprop="datePublished">2019-05-30</time>

            


            

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            <h2 id="学习笔记-DBUtils工具"><a href="#学习笔记-DBUtils工具" class="headerlink" title="学习笔记 : DBUtils工具"></a>学习笔记 : DBUtils工具</h2><p><em>简介 : 为了更加简单地使用<code>JDBC</code>,Apache组织提供了一个工具类库<code>commons-dbutils</code>,它是操作数据库的一个组件,实现了对JDBC的简单封装,可以在不影响性能的情况下极大地简化JDBC的编码工作量.</em></p>
<h3 id="API-介绍"><a href="#API-介绍" class="headerlink" title="API 介绍"></a>API 介绍</h3><p><em>简介 : <code>commons-dbutils</code>的核心是两个类为<code>DbUtils</code>,<code>QueryRunner</code>,和一个接口<code>ResultSetHandler</code></em>.</p>
<ol>
<li><em><code>org.apache.commons.dbutils.DbUtils</code> : 该类主要为如何关闭数据库连接,装载JDBC驱动程序之类的常规工作提供静态方法.</em></li>
<li><em><code>org.apache.commons.dbutils.QueryRunner</code> : 该类简化了执行SQL语句的代码,它与<code>ResultSetHandler</code>组合在一起就能完成大部分的数据库操作,大大减少编码量.</em></li>
<li><em><code>org.apache.commons.dbutils.ResultSetHandler</code> : 该接口用于处理ResultSet结果集,它可以将结果集中的数据转换为不同的形式.</em></li>
</ol>
<h3 id="CURE-案例"><a href="#CURE-案例" class="headerlink" title="CURE 案例"></a>CURE 案例</h3><ol>
<li><p><em>数据表信息</em></p>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">-- auto-generated definition by Intellij IDEA</span></span><br><span class="line"><span class="keyword">create</span> <span class="keyword">table</span> <span class="keyword">user</span></span><br><span class="line">(</span><br><span class="line">    <span class="keyword">id</span>       <span class="built_in">int</span> auto_increment primary <span class="keyword">key</span>,</span><br><span class="line">    <span class="keyword">name</span>     <span class="built_in">varchar</span>(<span class="number">15</span>) <span class="literal">null</span>,</span><br><span class="line">    <span class="keyword">password</span> <span class="built_in">varchar</span>(<span class="number">20</span>) <span class="literal">null</span></span><br><span class="line">)</span><br></pre></td></tr></table></figure>
</li>
<li><p><em>C3P0配置文件</em></p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">c3p0-config</span>&gt;</span></span><br><span class="line">    <span class="comment">&lt;!-- 默认配置: 在没有指定配置时默认使用该配置创建c3p0数据源对象 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">default-config</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"user"</span>&gt;</span>xxxxxx<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"password"</span>&gt;</span>xxxxxx<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"driverClass"</span>&gt;</span>com.mysql.cj.jdbc.Driver<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"jdbcUrl"</span>&gt;</span></span><br><span class="line">            jdbc:mysql://LOCALHOST/test?useSSL=false<span class="symbol">&amp;amp;</span>serverTimezone=UTC<span class="symbol">&amp;amp;</span>allowPublicKeyRetrieval=true</span><br><span class="line">        <span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"checkoutTimeout"</span>&gt;</span>30000<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"initialPoolSize"</span>&gt;</span>5<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"maxIdleTime"</span>&gt;</span>600<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"maxPoolSize"</span>&gt;</span>10<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"minPoolSize"</span>&gt;</span>1<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"maxStatements"</span>&gt;</span>200<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">default-config</span>&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="comment">&lt;!-- 自定义配置 --&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">named-config</span> <span class="attr">name</span>=<span class="string">"yu"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"user"</span>&gt;</span>xxxxxx<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"password"</span>&gt;</span>xxxxxx<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"driverClass"</span>&gt;</span>com.mysql.cj.jdbc.Driver<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"jdbcUrl"</span>&gt;</span></span><br><span class="line">            jdbc:mysql://LOCALHOST/test?useSSL=false<span class="symbol">&amp;amp;</span>serverTimezone=UTC<span class="symbol">&amp;amp;</span>allowPublicKeyRetrieval=true</span><br><span class="line">        <span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"initiaPoolSize"</span>&gt;</span>5<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">property</span> <span class="attr">name</span>=<span class="string">"maxPoolSize"</span>&gt;</span>15<span class="tag">&lt;/<span class="name">property</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">named-config</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">c3p0-config</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
<li><p><em>数据源工具类</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.dbutils.utils;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.mchange.v2.c3p0.ComboPooledDataSource;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.sql.DataSource;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@project</span>: dbutils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@package</span>: pers.huangyuhui.dbutils.utils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@description</span>: 创建数据源</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: 5/31/2019-7:00 PM</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span>: 1.0</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">C3P0Utils</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> DataSource dataSource;</span><br><span class="line"></span><br><span class="line">    <span class="comment">//创建数据源</span></span><br><span class="line">    <span class="keyword">static</span> &#123;</span><br><span class="line">        dataSource = <span class="keyword">new</span> ComboPooledDataSource(<span class="string">"yu"</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">//获取数据源</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> DataSource <span class="title">getDataSource</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> dataSource;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
</li>
<li><p><em>Java Bean : 存储用户信息</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.dbutils.bean;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@project</span>: dbutils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@package</span>: pers.huangyuhui.dbutils.bean</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@description</span>: 用户信息</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: 5/31/2019-7:13 PM</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span>: 1.0</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">User</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> Integer id;</span><br><span class="line">    <span class="keyword">private</span> String name;</span><br><span class="line">    <span class="keyword">private</span> String password;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> Integer <span class="title">getId</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> id;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setId</span><span class="params">(Integer id)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.id = id;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getName</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> name;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setName</span><span class="params">(String name)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.name = name;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">getPassword</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> password;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setPassword</span><span class="params">(String password)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">this</span>.password = password;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> String <span class="title">toString</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        <span class="keyword">return</span> <span class="string">"User&#123;"</span> +</span><br><span class="line">                <span class="string">"id="</span> + id +</span><br><span class="line">                <span class="string">", name='"</span> + name + <span class="string">'\''</span> +</span><br><span class="line">                <span class="string">", password='"</span> + password + <span class="string">'\''</span> +</span><br><span class="line">                <span class="string">'&#125;'</span>;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
</li>
<li><p><em>DAO层 : 封装数据库的基本操作</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.dbutils.dao;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.apache.commons.dbutils.QueryRunner;</span><br><span class="line"><span class="keyword">import</span> org.apache.commons.dbutils.handlers.BeanHandler;</span><br><span class="line"><span class="keyword">import</span> org.apache.commons.dbutils.handlers.BeanListHandler;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.dbutils.bean.User;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.dbutils.utils.C3P0Utils;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.sql.DataSource;</span><br><span class="line"><span class="keyword">import</span> java.sql.SQLException;</span><br><span class="line"><span class="keyword">import</span> java.util.List;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@project</span>: dbutils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@package</span>: pers.huangyuhui.dbutils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@description</span>: 数据库的基本操作</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: 5/31/2019-7:07 PM</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span>: 1.0</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">DBUtilsDao</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="comment">//获取数据源</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> DataSource dataSource = C3P0Utils.getDataSource();</span><br><span class="line">    <span class="comment">//创建queryRunner对象</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> QueryRunner queryRunner = <span class="keyword">new</span> QueryRunner(dataSource);</span><br><span class="line">    <span class="comment">//sql</span></span><br><span class="line">    <span class="keyword">private</span> String SQL_SELECT = <span class="string">"select id,name,password from user where id = ?"</span>;</span><br><span class="line">    <span class="keyword">private</span> String SQL_UPDATE = <span class="string">"update user set name=?,password=? where id=?"</span>;</span><br><span class="line">    <span class="keyword">private</span> String SQL_INSERT = <span class="string">"insert into user(name,password) values(?,?)"</span>;</span><br><span class="line">    <span class="keyword">private</span> String SQL_SELECTALL = <span class="string">"select id,name,password from user"</span>;</span><br><span class="line">    <span class="keyword">private</span> String SQL_DELETE = <span class="string">"delete from user where id=?"</span>;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 查询所有用户信息</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> List <span class="title">selectAll</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="comment">//获取用户列表</span></span><br><span class="line">        List&lt;User&gt; list = queryRunner.query(SQL_SELECTALL, <span class="keyword">new</span> BeanListHandler&lt;User&gt;(User<span class="class">.<span class="keyword">class</span>))</span>;</span><br><span class="line">        <span class="keyword">return</span> list;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 查询单个用户信息</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> User <span class="title">select</span><span class="params">(<span class="keyword">int</span> id)</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="comment">//获取用户信息</span></span><br><span class="line">        User user = queryRunner.query(SQL_SELECT, new BeanHandler&lt;&gt;(User.class), new Object[]&#123;id&#125;);</span><br><span class="line">        <span class="keyword">return</span> user;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 添加用户信息</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">insert</span><span class="params">(User user)</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="comment">//判断是否添加成功</span></span><br><span class="line">        <span class="keyword">int</span> num = queryRunner.update(SQL_INSERT, <span class="keyword">new</span> Object[]&#123;user.getName(), user.getPassword()&#125;);</span><br><span class="line">        <span class="keyword">if</span> (num &gt; <span class="number">0</span>) &#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">return</span> <span class="keyword">false</span>;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 修改用户信息</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">update</span><span class="params">(User user)</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="keyword">int</span> num = queryRunner.update(SQL_UPDATE, <span class="keyword">new</span> Object[]&#123;user.getName(), user.getPassword(), user.getId()&#125;);</span><br><span class="line">        <span class="keyword">if</span> (num &gt; <span class="number">0</span>) &#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">return</span> <span class="keyword">false</span>;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 删除用户信息</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">boolean</span> <span class="title">delete</span><span class="params">(<span class="keyword">int</span> id)</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="keyword">int</span> num = queryRunner.update(SQL_DELETE, id);</span><br><span class="line">        <span class="keyword">if</span> (num &gt; <span class="number">0</span>) &#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="keyword">true</span>;</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="keyword">false</span>;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
</li>
<li><p><em>测试类</em></p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> pers.huangyuhui.dbutils.test;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> org.junit.BeforeClass;</span><br><span class="line"><span class="keyword">import</span> org.junit.Ignore;</span><br><span class="line"><span class="keyword">import</span> org.junit.Test;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.dbutils.bean.User;</span><br><span class="line"><span class="keyword">import</span> pers.huangyuhui.dbutils.dao.DBUtilsDao;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.sql.SQLException;</span><br><span class="line"><span class="keyword">import</span> java.util.List;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@project</span>: dbutils</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@description</span>: 测试数据库的基本操作</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span>: HuangYuhui</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span>: 5/31/2019-7:45 PM</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span>: 1.0</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">DBUtilsDaoTest</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> User user;</span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> DBUtilsDao dbUtilsDao;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@BeforeClass</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">init</span><span class="params">()</span> </span>&#123;</span><br><span class="line">        user = <span class="keyword">new</span> User();</span><br><span class="line">        dbUtilsDao = <span class="keyword">new</span> DBUtilsDao();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Ignore</span></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 测试添加用户操作</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">insertTest</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        user.setName(<span class="string">"YUbuntu0109"</span>);</span><br><span class="line">        user.setPassword(<span class="string">"MyPassword"</span>);</span><br><span class="line">        <span class="keyword">if</span> (dbUtilsDao.insert(user)) &#123;</span><br><span class="line">            System.out.println(<span class="string">"success to insert a user information !"</span>);</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">"fail to insert a new user information !"</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">    <span class="meta">@Ignore</span></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 测试修改用户信息操作 </span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">updateTest</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        user.setId(<span class="number">1</span>);</span><br><span class="line">        user.setName(<span class="string">"YUbuntu0109-1"</span>);</span><br><span class="line">        user.setPassword(<span class="string">"MyPassword-1"</span>);</span><br><span class="line">        <span class="keyword">if</span> (dbUtilsDao.update(user)) &#123;</span><br><span class="line">            System.out.println(<span class="string">"success to update the user information !"</span>);</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">"fail to update the user information !"</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Ignore</span></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 测试删除用户操作</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">deleteTest</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        <span class="keyword">if</span> (dbUtilsDao.delete(<span class="number">1</span>)) &#123;</span><br><span class="line">            System.out.println(<span class="string">"success to delete the user information !"</span>);</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            System.out.println(<span class="string">"fail to delete the user information !"</span>);</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Ignore</span></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 测试查询单个用户信息操作</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">selectTest</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        System.out.println(dbUtilsDao.select(<span class="number">1</span>));</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Ignore</span></span><br><span class="line">    <span class="meta">@Test</span></span><br><span class="line">    <span class="comment">// <span class="doctag">TODO:</span> 6/8/2019 测试查询所有用户信息操作</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">selectAllTest</span><span class="params">()</span> <span class="keyword">throws</span> SQLException </span>&#123;</span><br><span class="line">        List users = dbUtilsDao.selectAll();</span><br><span class="line">        System.out.println(users);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></li>
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